[gary999]

Ian,I can't see any over 5 ton on that website?

That's right, but the overall rating is 5ton.  These are true ratings, lots of others are just the hooks, or webbing, as mentioned above.

Two straps at 5 ton rating will give you all the safety margin you need.  These straps will rip the chassis up through your van before they break.  A genuine 10ton strap is so bulky you wouldn't be able to get it round your tank

if you buy your straps from a reputable company such as spanset
which are a load and restraint company 5ton straps are fine they have
a proof rating of 6:1 and all fittings such as claw hooks or delta links
are rated at 2:1 so you are more than covered.

i wouldnt touch any of them off ebay as you dont know if genuine
article what they have been tested to.a genuine lifting and load
company will always give you a test certificate if have safe working load
marked on labels or a m.b.l. cert if marked with minimum break.

i worked for a lifting gear and load company for seventeen years
take it from me there are loads of substandard products out there
so dont take your life in your hands with second hand or inferior
gear